"Rail travel at high speeds is not possible because passengers, unable to breathe, would die of asphyxia."
Dionysius Lardner, Professor of Natural Philosophy and Astronomy at University College, London ; 1830
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| Number | Title | Issue Date |
| 6698120 | Scheduling sign system A scheduling sign system includes a main sign, at least one entity indicator, and at least one alternative indicator. The main sign displays an array of units of time. The entity indicator, which is separate from the main sign, displays information identi... | 03/02/2004 |
| 3987619 | Visual time indicator Visual time indicator suitable for incorporation in a watch or other time measuring devices comprising a dial made of a sheet of plate and concentrically divided into two zones: an inner zone and an outer zone, and hands to indicate hours, minutes and sec... | 10/26/1976 |